I made a lot of additional progress after my previous post yesterday. I switched to using a docker-compose style of build and followed this Balena post how-to-mount-lib-firmware-rw and I was able to have the module find the firmware and load successfully.
This provided a new network interface named wlp1s0u1u3 as seen in ifconfig. So now I think I need to follow this doc Network Setup on balenaOS - Balena Documentation to add the correct SSID.
One question I have is how do I tell the network config which WiFi interface to use?
Thanks,